:root {
  --theme-primary: #165DFF;
  --theme-primary-rgb: 22, 93, 255;
  --theme-primary-soft: #4080FF;
  --theme-accent: #FF7D00;
  --theme-accent-rgb: 255, 125, 0;
  --theme-accent-soft: #FF9A2E;
  --theme-hero-deep: #0A1628;
  --theme-hero-mid: #0F2847;
  --theme-hero-end: #1B3A6B;
  --theme-page-bg: #F2F3F5;
  --theme-text: #1D2129;
  --theme-heading: #0D1117;
  --theme-muted: #86909C;
  --theme-subtle: #A0A8B4;
  --theme-faint: #B8BFC8;
  --theme-soft-bg: rgba(22, 93, 255, .08);
  --theme-card-tint: #FFFFFF;
  --theme-card-tint-2: #F7F8FA;
  --theme-border-soft: #E5E6EB;
  --theme-border-card: #E5E6EB;
  --theme-chip-blue-bg: rgba(22, 93, 255, .10);
  --theme-chip-blue-bg-2: rgba(22, 93, 255, .18);
  --theme-chip-accent-bg: rgba(255, 125, 0, .12);
  --theme-chip-accent-bg-2: rgba(255, 125, 0, .2);
  --theme-chip-green-bg: #E8FFEA;
  --theme-chip-green-bg-2: #AFF0B5;
  --theme-chip-purple-bg: #F0E8FF;
  --theme-chip-purple-bg-2: #D4C2F7;
  --theme-warm-bg: rgba(255, 125, 0, .08);
}
/* ========== Reset & Base ========== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif; color: var(--theme-text); background: var(--theme-page-bg); line-height: 1.6; }
a { text-decoration: none; color: inherit; transition: color .2s; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ========== Header ========== */
.header { background: #fff; box-shadow: 0 2px 12px rgba(0,0,0,.06); position: sticky; top: 0; z-index: 1000; }
.header .container { display: flex; align-items: center; justify-content: space-between; height: 90px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 700; color: var(--theme-primary); }
.logo svg { width: 36px; height: 36px; }
.logo-img { width: 200px; height: auto; object-fit: contain; }
.nav { display: flex; align-items: center; gap: 32px; }
.nav a { font-size: 15px; color: var(--theme-text); font-weight: 500; position: relative; padding: 4px 0; }
.nav a:hover, .nav a.active { color: var(--theme-primary); }
.nav a::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px; background: var(--theme-primary); transition: width .25s; }
.nav a:hover::after { width: 100%; }
.header-right { display: flex; align-items: center; gap: 12px; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 8px 22px; border-radius: 6px; font-size: 14px; font-weight: 500; cursor: pointer; border: none; transition: all .25s; }
.btn-outline { border: 1px solid var(--theme-primary); color: var(--theme-primary); background: transparent; }
.btn-outline:hover { background: var(--theme-primary); color: #fff; }
.btn-primary { background: linear-gradient(135deg, var(--theme-primary), var(--theme-primary-soft)); color: #fff; box-shadow: 0 4px 12px rgba(var(--theme-primary-rgb), .3); }
.btn-primary:hover { box-shadow: 0 6px 20px rgba(var(--theme-primary-rgb), .42); transform: translateY(-1px); }
.btn-orange { background: linear-gradient(135deg, var(--theme-accent), var(--theme-accent-soft)); color: #fff; box-shadow: 0 4px 12px rgba(var(--theme-accent-rgb), .28); }
.btn-orange:hover { box-shadow: 0 6px 20px rgba(var(--theme-accent-rgb), .4); transform: translateY(-1px); }
.btn-lg { padding: 12px 32px; font-size: 15px; min-height: 48px; }
.btn-sm { padding: 8px 20px; font-size: 13px; }
.btn-xs { padding: 8px 16px; font-size: 12px; }
.btn-full { width: 100%; }
.btn-hero-outline { border-color: rgba(255,255,255,.4); color: #fff; }
.btn-hero-outline:hover { border-color: rgba(255,255,255,.4); background: rgba(255,255,255,.08); color: #fff; }
.action-row { display: flex; gap: 14px; flex-wrap: wrap; }
.product-hero-actions { margin-top: 28px; }
.product-card-action { margin-top: 16px; }
.step-action-link { margin-top: 16px; }
.step-action-row { display: flex; gap: 8px; margin-top: 16px; flex-wrap: wrap; }
.section-surface { background: #fff; }
.title-link { color: var(--theme-primary); }
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; padding-bottom: 8px; scrollbar-width: thin; }
.table-scroll::-webkit-scrollbar { height: 8px; }
.table-scroll::-webkit-scrollbar-thumb { background: rgba(var(--theme-primary-rgb), .22); border-radius: 999px; }

/* ========== Hero Banner ========== */
.hero { background: linear-gradient(135deg, var(--theme-hero-deep) 0%, var(--theme-hero-mid) 50%, var(--theme-hero-end) 100%); padding: 80px 0 90px; position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: -50%; right: -10%; width: 600px; height: 600px; background: radial-gradient(circle, rgba(var(--theme-primary-rgb), .16) 0%, transparent 70%); border-radius: 50%; }
.hero::after { content: ''; position: absolute; bottom: -30%; left: -5%; width: 400px; height: 400px; background: radial-gradient(circle, rgba(var(--theme-accent-rgb), .12) 0%, transparent 70%); border-radius: 50%; }
.hero .container { display: flex; align-items: center; justify-content: space-between; position: relative; z-index: 1; }
.hero-text { max-width: 560px; }
.hero-text h1 { font-size: 42px; color: #fff; margin-bottom: 16px; line-height: 1.3; }
.hero-text h1 span { color: var(--theme-accent); }
.hero-text p { font-size: 17px; color: rgba(255,255,255,.75); margin-bottom: 32px; line-height: 1.8; }
.hero-btns { display: flex; gap: 16px; }
.hero-btns .btn { min-width: 168px; }
.hero-stats { display: flex; gap: 48px; margin-top: 48px; }
.hero-stats .stat { text-align: center; }
.hero-stats .stat-num { font-size: 32px; font-weight: 700; color: var(--theme-accent); }
.hero-stats .stat-label { font-size: 13px; color: rgba(255,255,255,.6); margin-top: 4px; }
.hero-illustration { width: 420px; height: 320px; background: rgba(255,255,255,.05); border-radius: 16px; border: 1px solid rgba(255,255,255,.08); display: flex; align-items: center; justify-content: center; backdrop-filter: blur(10px); }
.hero-illustration svg { width: 280px; height: 280px; opacity: .85; }

/* ========== Section Common ========== */
.section { padding: 80px 0; }
.section-title { text-align: center; margin-bottom: 52px; }
.section-title h2 { font-size: 32px; color: var(--theme-heading); margin-bottom: 12px; }
.section-title p { font-size: 15px; color: var(--theme-muted); }
.section-title h2 span { color: var(--theme-primary); }

/* ========== Products ========== */
.products-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.product-card { background: #fff; border-radius: 14px; padding: 36px 28px; text-align: center; box-shadow: 0 4px 20px rgba(0,0,0,.04); transition: all .35s; border: 1px solid transparent; position: relative; overflow: hidden; }
.product-card:hover { transform: translateY(-6px); box-shadow: 0 12px 36px rgba(var(--theme-primary-rgb), .1); border-color: var(--theme-primary); }
.product-icon { width: 72px; height: 72px; border-radius: 16px; margin: 0 auto 20px; display: flex; align-items: center; justify-content: center; font-size: 32px; }
.product-icon.blue { background: linear-gradient(135deg, var(--theme-chip-blue-bg), var(--theme-chip-blue-bg-2)); color: var(--theme-primary); }
.product-icon.orange { background: linear-gradient(135deg, var(--theme-chip-accent-bg), var(--theme-chip-accent-bg-2)); color: var(--theme-accent); }
.product-icon.green { background: linear-gradient(135deg, var(--theme-chip-green-bg), var(--theme-chip-green-bg-2)); color: #00b853; }
.product-icon.purple { background: linear-gradient(135deg, var(--theme-chip-purple-bg), var(--theme-chip-purple-bg-2)); color: #7c3aed; }
.product-card h3 { font-size: 18px; color: var(--theme-heading); margin-bottom: 10px; }
.product-card p { font-size: 13px; color: var(--theme-muted); line-height: 1.7; margin-bottom: 20px; min-height: 44px; }
.product-tag { display: inline-block; padding: 3px 10px; background: var(--theme-soft-bg); color: var(--theme-primary); font-size: 12px; border-radius: 20px; margin: 2px; }

/* ========== Advantages ========== */
.advantages { background: #fff; }
.adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.adv-item { padding: 32px 28px; border-radius: 12px; background: var(--theme-card-tint); border: 1px solid var(--theme-border-soft); transition: all .3s; }
.adv-item:hover { background: #fff; box-shadow: 0 8px 30px rgba(var(--theme-primary-rgb), .08); border-color: var(--theme-primary); }
.adv-icon { width: 52px; height: 52px; border-radius: 12px; background: linear-gradient(135deg, var(--theme-primary), var(--theme-primary-soft)); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 24px; margin-bottom: 18px; }
.adv-icon.orange { background: linear-gradient(135deg,#FF7D00,#ff9a33); }
.adv-icon.green { background: linear-gradient(135deg,#00b853,#26d970); }
.adv-icon.purple { background: linear-gradient(135deg,#7c3aed,#9f67ff); }
.adv-icon.rose { background: linear-gradient(135deg,#e91e63,#ff5252); }
.adv-icon.cyan { background: linear-gradient(135deg,#0097a7,#00bcd4); }
.adv-item h4 { font-size: 17px; color: var(--theme-heading); margin-bottom: 8px; }
.adv-item p { font-size: 13px; color: var(--theme-muted); line-height: 1.7; }

/* ========== Pricing ========== */
.pricing-tabs { display: flex; justify-content: center; gap: 8px; margin-bottom: 40px; }
.pricing-tab { padding: 10px 28px; border-radius: 8px; font-size: 14px; font-weight: 500; cursor: pointer; background: #f0f2f5; color: #666; transition: all .25s; border: none; }
.pricing-tab.active { background: var(--theme-primary); color: #fff; }
.pricing-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.price-card { background: #fff; border-radius: 14px; padding: 36px 28px; text-align: center; border: 2px solid #eee; transition: all .3s; position: relative; }
.price-card.hot { border-color: var(--theme-accent); }
.price-card.hot::before { content: '鐑攢'; position: absolute; top: 14px; right: -30px; background: var(--theme-accent); color: #fff; font-size: 12px; padding: 3px 36px; transform: rotate(45deg); }
.price-card:hover { transform: translateY(-4px); box-shadow: 0 12px 36px rgba(0,0,0,.08); }
.price-card h3 { font-size: 20px; color: var(--theme-heading); margin-bottom: 8px; }
.price-card .price { font-size: 42px; font-weight: 700; color: var(--theme-primary); margin: 20px 0; }
.price-card .price small { font-size: 16px; font-weight: 400; color: var(--theme-subtle); }
.price-card .price .unit { font-size: 14px; }
.price-card ul { margin: 24px 0; }
.price-card li { padding: 8px 0; font-size: 14px; color: #666; border-bottom: 1px dashed #f0f0f0; }
.price-card li:last-child { border: none; }
.price-card li .check { color: #00b853; margin-right: 6px; }

/* ========== Scenarios ========== */
.scenarios { background: #fff; }
.scenario-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.scenario-item { background: linear-gradient(135deg, var(--theme-card-tint), var(--theme-card-tint-2)); border-radius: 12px; padding: 28px 20px; text-align: center; transition: all .3s; cursor: default; border: 1px solid var(--theme-border-soft); }
.scenario-item:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(var(--theme-primary-rgb), .1); }
.scenario-item .icon { font-size: 36px; margin-bottom: 14px; }
.scenario-item h4 { font-size: 15px; color: var(--theme-heading); margin-bottom: 6px; }
.scenario-item p { font-size: 12px; color: var(--theme-subtle); }

/* ========== VIP Levels ========== */
.vip-table { width: 100%; min-width: 680px; border-collapse: collapse; background: #fff; border-radius: 12px; overflow: hidden; box-shadow: 0 4px 20px rgba(0,0,0,.04); }
.vip-table th { background: linear-gradient(135deg, var(--theme-primary), var(--theme-primary-soft)); color: #fff; padding: 16px; font-size: 14px; font-weight: 500; }
.vip-table td { padding: 14px 16px; text-align: center; font-size: 14px; color: #555; border-bottom: 1px solid #f0f0f0; }
.vip-table tr:hover td { background: var(--theme-card-tint); }
.vip-badge { display: inline-block; padding: 2px 12px; border-radius: 20px; font-size: 12px; font-weight: 600; }
.vip-badge.v1 { background: #e8f5e9; color: #2e7d32; }
.vip-badge.v2 { background: #e3f2fd; color: #1565c0; }
.vip-badge.v3 { background: var(--theme-chip-accent-bg); color: #e65100; }
.vip-badge.v4 { background: #fce4ec; color: #c62828; }
.vip-badge.v5 { background: #f3e5f5; color: #6a1b9a; }

/* ========== QQ / Contact float ========== */
.contact-float { position: fixed; right: 20px; bottom: 100px; z-index: 999; display: flex; flex-direction: column; gap: 10px; }
.contact-float a { width: 52px; height: 52px; border-radius: 12px; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 22px; box-shadow: 0 4px 16px rgba(0,0,0,.15); transition: all .25s; }
.contact-float a:hover { transform: scale(1.1); }
.contact-float .qq-btn { background: linear-gradient(135deg, #12b7f5, #0d8bd9); }
.contact-float .top-btn { background: linear-gradient(135deg, var(--theme-primary), var(--theme-primary-soft)); }

/* ========== News ========== */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-col h3 { font-size: 18px; color: var(--theme-heading); padding-bottom: 14px; margin-bottom: 18px; border-bottom: 2px solid var(--theme-primary); display: inline-block; }
.news-item { padding: 12px 0; border-bottom: 1px dashed #eee; }
.news-item a { font-size: 14px; color: #555; display: flex; justify-content: space-between; align-items: center; }
.news-item a:hover { color: var(--theme-primary); }
.news-item .date { font-size: 12px; color: var(--theme-faint); white-space: nowrap; margin-left: 12px; }

/* ========== Footer ========== */
.footer { background: var(--theme-hero-deep); color: rgba(255,255,255,.7); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand-logo { color: #fff; font-size: 20px; }
.footer-brand-mark { display: block; width: min(200px, 100%); aspect-ratio: 1 / 1; height: auto; border-radius: 6px; object-fit: contain; }
.footer-brand p { font-size: 13px; line-height: 1.8; margin-top: 14px; }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 18px; }
.footer-links a { display: block; font-size: 13px; color: rgba(255,255,255,.55); padding: 5px 0; transition: color .2s; }
.footer-links a:hover { color: var(--theme-accent); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 20px 0; text-align: center; font-size: 12px; color: rgba(255,255,255,.35); }

/* ========== Animations ========== */
.fade-up { opacity: 0; transform: translateY(30px); transition: all .6s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ========== Mobile ========== */
.menu-toggle { display: none; background: none; border: none; font-size: 24px; color: var(--theme-text); cursor: pointer; }
@media (max-width: 1024px) {
  .products-grid, .pricing-cards { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .hero .container { flex-direction: column; text-align: center; }
  .hero-illustration { display: none; }
  .hero-text h1 { font-size: 32px; }
  .hero-stats { justify-content: center; }
  .hero-btns { justify-content: center; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .container { padding: 0 16px; }
  .nav { display: none; position: absolute; top: 72px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 20px; box-shadow: 0 8px 20px rgba(0,0,0,.1); gap: 16px; }
  .nav.open { display: flex; }
  .menu-toggle { display: block; }
  .products-grid, .adv-grid, .scenario-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pricing-cards, .news-grid { grid-template-columns: 1fr; }
  .hero-text h1 { font-size: 26px; }
  .hero-btns { flex-direction: column; width: 100%; }
  .hero-btns .btn { width: 100%; }
  .hero-stats { flex-wrap: wrap; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; }
  .vip-table { font-size: 12px; }
}

/* ========== Dropdown Nav ========== */
.nav { display: flex; align-items: center; gap: 4px; }
.nav-item { position: relative; }
.nav-item > a { display: flex; align-items: center; gap: 4px; padding: 8px 14px; font-size: 15px; color: var(--theme-text); font-weight: 500; border-radius: 6px; white-space: nowrap; transition: all .2s; }
.nav-item > a:hover, .nav-item.active > a { color: var(--theme-primary); background: var(--theme-soft-bg); }
.nav-item .arrow { font-size: 10px; transition: transform .2s; }
.nav-item.show .arrow { transform: rotate(180deg); }
.dropdown-menu { position: absolute; top: 100%; left: 50%; transform: translateX(-50%) translateY(6px); background: #fff; border-radius: 10px; box-shadow: 0 8px 30px rgba(0,0,0,.12); min-width: 160px; padding: 8px; opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; z-index: 999; }
.dropdown-menu::before { content: ''; position: absolute; left: 0; right: 0; top: -10px; height: 10px; }
.nav-item.show .dropdown-menu { opacity: 1; pointer-events: auto; }
.dropdown-menu a { display: flex; align-items: center; gap: 8px; padding: 10px 14px; font-size: 14px; color: #444; border-radius: 6px; transition: all .2s; }
.dropdown-menu a:hover { background: var(--theme-soft-bg); color: var(--theme-primary); }
.dm-icon { font-size: 16px; }

/* ========== Page Hero (sub pages) ========== */
.page-hero { background: linear-gradient(135deg, var(--theme-hero-deep), var(--theme-hero-mid)); padding: 60px 0; text-align: center; }
.page-hero h1 { font-size: 36px; color: #fff; margin-bottom: 12px; }
.page-hero p { font-size: 16px; color: rgba(255,255,255,.65); }
.breadcrumb { display: flex; align-items: center; justify-content: center; gap: 8px; margin-bottom: 20px; font-size: 13px; color: rgba(255,255,255,.5); }
.breadcrumb a { color: rgba(255,255,255,.5); }
.breadcrumb a:hover { color: var(--theme-accent); }
.breadcrumb span { color: var(--theme-accent); }

/* ========== Product Detail Page ========== */
.product-hero { background: linear-gradient(135deg, var(--theme-hero-deep), var(--theme-hero-end)); padding: 80px 0; }
.product-hero .container { display: flex; align-items: center; gap: 60px; }
.product-hero-text { flex: 1; }
.product-hero-text h1 { font-size: 38px; color: #fff; margin-bottom: 16px; line-height: 1.3; }
.product-hero-text h1 span { color: var(--theme-accent); }
.product-hero-text p { font-size: 16px; color: rgba(255,255,255,.7); margin-bottom: 30px; line-height: 1.8; }
.product-hero-img { width: 380px; flex-shrink: 0; }
.mock-window { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1); border-radius: 12px; padding: 20px; backdrop-filter: blur(10px); }
.mock-titlebar { display: flex; gap: 6px; margin-bottom: 16px; }
.mock-titlebar span { width: 12px; height: 12px; border-radius: 50%; }
.mock-titlebar .r { background: #ff5f57; }
.mock-titlebar .y { background: #ffbd2e; }
.mock-titlebar .g { background: #28c840; }
.mock-content { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.mock-card { background: rgba(255,255,255,.08); border-radius: 8px; padding: 14px 10px; text-align: center; }
.mock-card .mc-num { font-size: 20px; font-weight: 700; color: var(--theme-accent); }
.mock-card small { font-size: 12px; }
.mock-card .mc-label { font-size: 11px; color: rgba(255,255,255,.5); margin-top: 4px; }
.feature-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.feature-tag { padding: 5px 14px; background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.15); color: rgba(255,255,255,.8); border-radius: 20px; font-size: 13px; }

/* ========== Product Advantages ========== */
.prod-adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.prod-adv-card { background: #fff; border-radius: 12px; padding: 28px 24px; border: 1px solid var(--theme-border-card); transition: all .3s; }
.prod-adv-card:hover { box-shadow: 0 8px 28px rgba(var(--theme-primary-rgb), .1); border-color: var(--theme-primary); transform: translateY(-4px); }
.prod-adv-icon { font-size: 36px; margin-bottom: 14px; }
.prod-adv-card h4 { font-size: 16px; color: var(--theme-heading); margin-bottom: 8px; }
.prod-adv-card p { font-size: 13px; color: var(--theme-muted); line-height: 1.7; }

/* ========== Pricing Table (product detail) ========== */
.pricing-detail-table { width: 100%; min-width: 720px; border-collapse: collapse; background: #fff; border-radius: 12px; overflow: hidden; box-shadow: 0 4px 20px rgba(0,0,0,.06); }
.pricing-detail-table th { background: linear-gradient(135deg, var(--theme-primary), var(--theme-primary-soft)); color: #fff; padding: 14px 16px; font-size: 14px; font-weight: 500; text-align: center; }
.pricing-detail-table td { padding: 13px 16px; text-align: center; font-size: 14px; color: #555; border-bottom: 1px solid #f5f5f5; }
.pricing-detail-table tr:last-child td { border: none; }
.pricing-detail-table tr:hover td { background: var(--theme-card-tint); }
.pricing-detail-table .price-cell { font-size: 20px; font-weight: 700; color: var(--theme-primary); }
.pricing-detail-table .hot-row td { background: var(--theme-warm-bg); }
.hot-badge { display: inline-block; padding: 2px 8px; background: var(--theme-accent); color: #fff; border-radius: 4px; font-size: 11px; margin-left: 6px; }
.pricing-note { text-align: center; margin-top: 16px; font-size: 13px; color: var(--theme-subtle); }

/* ========== How to Use Steps ========== */
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.step-item { background: #fff; border-radius: 12px; padding: 32px 24px; text-align: center; border: 1px solid var(--theme-border-card); position: relative; }
.step-num { width: 48px; height: 48px; border-radius: 50%; background: linear-gradient(135deg, var(--theme-primary), var(--theme-primary-soft)); color: #fff; font-size: 20px; font-weight: 700; display: flex; align-items: center; justify-content: center; margin: 0 auto 18px; }
.step-item h4 { font-size: 16px; color: var(--theme-heading); margin-bottom: 8px; }
.step-item p { font-size: 13px; color: var(--theme-muted); line-height: 1.7; }

/* ========== Download Page ========== */
.dl-shell { display: flex; flex-direction: column; gap: 24px; }
.dl-overview { display: grid; grid-template-columns: 1.4fr .8fr; gap: 24px; padding: 30px 32px; border-radius: 20px; background: linear-gradient(135deg, #fff, var(--theme-card-tint)); border: 1px solid var(--theme-border-card); box-shadow: 0 18px 40px rgba(0,0,0,.04); }
.dl-overview-copy h2 { font-size: 30px; color: var(--theme-heading); line-height: 1.3; margin-bottom: 10px; }
.dl-overview-copy p { font-size: 14px; color: var(--theme-muted); line-height: 1.8; max-width: 620px; }
.dl-overview-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.dl-stat { padding: 18px; border-radius: 16px; background: #fff; border: 1px solid var(--theme-border-card); }
.dl-stat strong { display: block; font-size: 24px; color: var(--theme-primary); margin-bottom: 4px; }
.dl-stat span { font-size: 12px; color: var(--theme-subtle); }
.dl-tabs { display: flex; gap: 10px; flex-wrap: wrap; }
.dl-tab { padding: 11px 18px; border-radius: 999px; background: #fff; border: 1px solid var(--theme-border-card); font-size: 14px; color: var(--theme-muted); cursor: pointer; transition: all .25s; }
.dl-tab:hover { border-color: var(--theme-primary); color: var(--theme-primary); }
.dl-tab.active { background: linear-gradient(135deg, var(--theme-primary), var(--theme-primary-soft)); border-color: transparent; color: #fff; box-shadow: 0 8px 20px rgba(var(--theme-primary-rgb), .22); }
.dl-groups { display: flex; flex-direction: column; gap: 24px; }
.dl-group { background: #fff; border-radius: 20px; border: 1px solid var(--theme-border-card); padding: 28px; box-shadow: 0 14px 30px rgba(0,0,0,.03); }
.dl-group-head { display: flex; align-items: end; justify-content: space-between; gap: 18px; padding-bottom: 18px; margin-bottom: 22px; border-bottom: 1px solid var(--theme-border-card); }
.dl-group-copy small { display: inline-block; font-size: 12px; color: var(--theme-primary); background: var(--theme-soft-bg); border-radius: 999px; padding: 5px 10px; margin-bottom: 10px; }
.dl-group-copy h3 { font-size: 24px; color: var(--theme-heading); margin-bottom: 6px; }
.dl-group-copy p { font-size: 13px; color: var(--theme-muted); }
.dl-group-meta { font-size: 12px; color: var(--theme-subtle); white-space: nowrap; }
.dl-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.dl-card { background: linear-gradient(180deg, #fff, var(--theme-card-tint)); border-radius: 18px; padding: 22px; border: 1px solid var(--theme-border-card); transition: all .3s; display: flex; flex-direction: column; gap: 16px; }
.dl-card:hover { box-shadow: 0 10px 30px rgba(var(--theme-primary-rgb), .1); border-color: var(--theme-primary); transform: translateY(-4px); }
.dl-card-top { display: flex; align-items: flex-start; gap: 16px; }
.dl-icon { width: 56px; height: 56px; border-radius: 16px; background: linear-gradient(135deg, var(--theme-chip-blue-bg), var(--theme-chip-blue-bg-2)); display: flex; align-items: center; justify-content: center; font-size: 28px; flex-shrink: 0; }
.dl-icon.peach { background: linear-gradient(135deg,#fff3e0,#ffe0b2); }
.dl-icon.mint { background: linear-gradient(135deg,#e0f7e9,#b9f6ca); }
.dl-icon.green { background: linear-gradient(135deg,#e8f5e9,#c8e6c9); }
.dl-icon.lilac { background: linear-gradient(135deg,#f3e5f5,#e1bee7); }
.dl-icon.amber { background: linear-gradient(135deg,#fff8e1,#ffecb3); }
.dl-icon.sky { background: linear-gradient(135deg,#e3f2fd,#bbdefb); }
.dl-icon.indigo { background: linear-gradient(135deg,#e8eaf6,#c5cae9); }
.dl-head { flex: 1; min-width: 0; }
.dl-title-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 8px; }
.dl-card h3 { font-size: 18px; color: var(--theme-heading); line-height: 1.3; }
.dl-badge { display: inline-flex; align-items: center; justify-content: center; height: 28px; padding: 0 12px; border-radius: 999px; background: var(--theme-soft-bg); color: var(--theme-primary); font-size: 12px; font-weight: 600; flex-shrink: 0; }
.dl-subtitle { font-size: 12px; color: var(--theme-subtle); line-height: 1.6; }
.dl-card .dl-meta { display: flex; flex-wrap: wrap; gap: 10px; }
.dl-card .dl-meta span { display: inline-flex; align-items: center; gap: 6px; height: 30px; padding: 0 12px; border-radius: 999px; background: #fff; border: 1px solid var(--theme-border-card); font-size: 12px; color: var(--theme-subtle); }
.dl-card .dl-desc { font-size: 13px; color: #777; line-height: 1.75; }
.dl-footer { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: auto; }
.dl-card .dl-count { font-size: 12px; color: var(--theme-faint); }
.btn-download { display: inline-flex; align-items: center; gap: 8px; justify-content: center; padding: 10px 16px; min-width: 132px; border-radius: 999px; background: linear-gradient(135deg, var(--theme-primary), var(--theme-primary-soft)); color: #fff; font-size: 13px; font-weight: 600; box-shadow: 0 8px 18px rgba(var(--theme-primary-rgb), .22); transition: all .25s; flex-shrink: 0; }
.btn-download svg { width: 16px; height: 16px; }
.btn-download:hover { box-shadow: 0 12px 24px rgba(var(--theme-primary-rgb), .34); transform: translateY(-1px); }
.dl-cta { margin-top: 8px; padding: 34px 36px; border-radius: 20px; background: linear-gradient(135deg, var(--theme-hero-deep), var(--theme-hero-mid)); color: rgba(255,255,255,.8); text-align: center; overflow: hidden; position: relative; }
.dl-cta::before { content: ''; position: absolute; inset: auto -10% -40% auto; width: 240px; height: 240px; border-radius: 50%; background: radial-gradient(circle, rgba(var(--theme-accent-rgb), .2), transparent 70%); }
.dl-cta > * { position: relative; z-index: 1; }
.dl-cta-icon { font-size: 42px; margin-bottom: 12px; }
.dl-cta h3 { font-size: 24px; color: #fff; margin-bottom: 10px; }
.dl-cta p { max-width: 620px; margin: 0 auto 22px; line-height: 1.8; }
.dl-cta .btn { padding: 12px 30px; font-size: 15px; }

/* ========== Notice Page ========== */
.notice-toolbar { display: flex; gap: 16px; align-items: center; margin-bottom: 32px; flex-wrap: wrap; }
.notice-tabs-flat { margin: 0; }
.notice-toolbar-search { margin-left: auto; }
.notice-search-input { width: 220px; padding: 9px 16px; border: 1px solid #e0e0e0; border-radius: 8px; font-size: 14px; outline: none; transition: border-color .2s, box-shadow .2s; }
.notice-search-input:focus { border-color: var(--theme-primary); box-shadow: 0 0 0 3px rgba(var(--theme-primary-rgb), .12); }
.notice-tabs { display: flex; gap: 8px; margin-bottom: 32px; flex-wrap: wrap; }
.notice-tab { padding: 10px 24px; border-radius: 8px; background: #fff; border: 1px solid #e0e0e0; font-size: 14px; color: #666; cursor: pointer; transition: all .25s; }
.notice-tab.active { background: var(--theme-primary); border-color: var(--theme-primary); color: #fff; }
.notice-list { display: flex; flex-direction: column; gap: 16px; }
.notice-card { background: #fff; border-radius: 12px; padding: 24px 28px; border: 1px solid var(--theme-border-card); transition: all .25s; cursor: pointer; }
.notice-card:hover { border-color: var(--theme-primary); box-shadow: 0 4px 16px rgba(var(--theme-primary-rgb), .08); }
.notice-card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; }
.notice-card h3 { display: inline; font-size: 16px; color: var(--theme-heading); font-weight: 500; }
.notice-card .nc-date { font-size: 12px; color: var(--theme-faint); white-space: nowrap; margin-top: 3px; }
.notice-card p { font-size: 13px; color: var(--theme-muted); margin-top: 10px; line-height: 1.7; }
.notice-badge { display: inline-block; padding: 2px 10px; border-radius: 4px; font-size: 11px; font-weight: 600; margin-right: 8px; }
.notice-pagination { display: flex; justify-content: center; gap: 8px; margin-top: 40px; flex-wrap: wrap; }
.notice-page-btn { width: 36px; height: 36px; border-radius: 8px; background: #fff; color: #666; border: 1px solid #e0e0e0; cursor: pointer; font-size: 14px; transition: all .2s; }
.notice-page-btn:hover { border-color: var(--theme-primary); color: var(--theme-primary); }
.notice-page-btn.active { background: var(--theme-primary); color: #fff; border-color: var(--theme-primary); }
.notice-page-btn.active:hover { color: #fff; }
.badge-blue { background: var(--theme-chip-blue-bg); color: var(--theme-primary); }
.badge-orange { background: var(--theme-chip-accent-bg); color: var(--theme-accent); }
.badge-green { background: var(--theme-chip-green-bg); color: #00b853; }
.badge-gray { background: #f5f5f5; color: var(--theme-muted); }

/* ========== Help Center Page ========== */
.helpcenter-layout { display: grid; grid-template-columns: 260px 1fr; gap: 28px; align-items: start; }
.help-sidebar { background: #fff; border-radius: 12px; border: 1px solid var(--theme-border-card); overflow: hidden; position: sticky; top: 88px; }
.help-sidebar-search { padding: 16px; border-bottom: 1px solid #f0f0f0; }
.help-sidebar-search input { width: 100%; padding: 9px 14px; border: 1px solid #e0e0e0; border-radius: 8px; font-size: 13px; outline: none; transition: border .2s; }
.help-sidebar-search input:focus { border-color: var(--theme-primary); }
.help-cat-title { padding: 14px 18px; font-size: 14px; font-weight: 600; color: var(--theme-text); cursor: pointer; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid #f5f5f5; user-select: none; transition: background .2s; }
.help-cat-title:hover { background: var(--theme-card-tint); }
.help-cat-title .cat-arrow { font-size: 11px; color: var(--theme-faint); transition: transform .2s; }
.help-cat.open .cat-arrow { transform: rotate(90deg); }
.help-cat-items { display: none; }
.help-cat.open .help-cat-items { display: block; }
.help-cat-item { padding: 10px 18px 10px 38px; font-size: 13px; color: #666; cursor: pointer; border-bottom: 1px solid #f8f8f8; transition: all .2s; }
.help-cat-item:hover, .help-cat-item.active { background: var(--theme-soft-bg); color: var(--theme-primary); }
.help-content { background: #fff; border-radius: 12px; border: 1px solid var(--theme-border-card); padding: 36px 40px; min-height: 500px; }
.help-content h2 { font-size: 22px; color: var(--theme-heading); margin-bottom: 20px; padding-bottom: 16px; border-bottom: 1px solid #f0f0f0; }
.help-article { font-size: 14px; color: #555; line-height: 1.9; }
.help-article h3 { font-size: 16px; color: var(--theme-heading); margin: 24px 0 10px; }
.help-article a, .help-contact a { color: var(--theme-primary); text-decoration: none; }
.help-article a:hover, .help-contact a:hover { text-decoration: underline; }
.help-article ol, .help-article ul { padding-left: 20px; margin: 12px 0; }
.help-article li { margin-bottom: 8px; }
.help-code-block { background: #f5f7fa; padding: 16px; border-radius: 8px; font-size: 13px; overflow-x: auto; }
.tip-box { background: var(--theme-soft-bg); border-left: 3px solid var(--theme-primary); border-radius: 6px; padding: 14px 18px; margin: 16px 0; font-size: 13px; color: #555; }
.help-contact { background: var(--theme-soft-bg); border-radius: 10px; padding: 20px 24px; margin-top: 24px; display: flex; align-items: center; gap: 16px; }
.help-contact-icon { font-size: 32px; line-height: 1; }
.help-contact p { font-size: 13px; color: #555; }
.help-contact strong { color: var(--theme-primary); }
.help-video { margin-top: 60px; }
.help-video-title { margin-bottom: 36px; }
.help-video-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.help-video-card { background: #fff; border-radius: 12px; overflow: hidden; border: 1px solid #eef0f5; transition: transform .3s, box-shadow .3s, border-color .3s; }
.help-video-card:hover { transform: translateY(-4px); box-shadow: 0 8px 28px rgba(var(--theme-primary-rgb), .1); border-color: rgba(var(--theme-primary-rgb), .18); }
.help-video-link { height: 140px; display: flex; align-items: center; justify-content: center; font-size: 48px; cursor: pointer; text-decoration: none; color: inherit; }
.help-video-link--blue { background: linear-gradient(135deg, #165DFF, #3b7dff); }
.help-video-link--orange { background: linear-gradient(135deg, #FF7D00, #ff9a33); }
.help-video-link--green { background: linear-gradient(135deg, #00b853, #26d970); }
.help-video-copy { padding: 20px; }
.help-video-heading { font-size: 15px; color: var(--theme-heading); margin-bottom: 6px; }
.help-video-text { font-size: 12px; color: #999; }

/* ========== Multi-page Responsive ========== */
@media (max-width: 1024px) {
  .prod-adv-grid { grid-template-columns: repeat(2, 1fr); }
  .dl-overview { grid-template-columns: 1fr; }
  .dl-grid { grid-template-columns: 1fr; }
  .helpcenter-layout { grid-template-columns: 1fr; }
  .help-sidebar { position: static; }
  .help-video-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .product-hero .container { flex-direction: column; }
  .product-hero-img { width: 100%; }
  .product-hero-actions .btn { width: 100%; }
}
@media (max-width: 768px) {
  .prod-adv-grid, .dl-grid, .help-video-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps-grid { grid-template-columns: 1fr; }
  .page-hero h1 { font-size: 26px; }
  .product-hero-text h1 { font-size: 28px; }
  .pricing-detail-table { font-size: 12px; }
  .pricing-detail-table th, .pricing-detail-table td { padding: 10px 8px; }
  .help-content { padding: 24px 20px; }
  .dl-overview, .dl-group, .dl-cta { padding: 22px 20px; }
  .dl-group-head, .dl-footer { flex-direction: column; align-items: flex-start; }
  .dl-title-row { flex-direction: column; align-items: flex-start; }
  .btn-download { width: 100%; }
  .notice-toolbar-search { width: 100%; margin-left: 0; }
  .notice-search-input { width: 100%; }
  .notice-card-top { flex-direction: column; }
  .step-action-row .btn { flex: 1 1 140px; }
}
@media (max-width: 560px) {
  .hero { padding: 64px 0 72px; }
  .section { padding: 64px 0; }
  .hero-stats { gap: 18px; }
  .hero-stats .stat { min-width: calc(50% - 9px); }
  .hero-stats .stat-num { font-size: 28px; }
  .section-title { margin-bottom: 38px; }
  .section-title h2 { font-size: 28px; }
  .product-hero { padding: 64px 0; }
  .product-hero-actions { gap: 12px; }
  .product-hero-actions .btn { width: 100%; }
  .mock-content { grid-template-columns: repeat(2, 1fr); }
  .step-action-row { flex-direction: column; }
  .step-action-row .btn { width: 100%; }
}

.nav-mobile-actions { display: none; }

@media (max-width: 768px) {
  body.nav-open { overflow: hidden; }
  .header { overflow: visible; }
  .header .container {
    position: relative;
    min-height: 72px;
    height: auto;
    gap: 12px;
    padding-top: 10px;
    padding-bottom: 10px;
  }
  .logo { min-width: 0; }
  .logo-img { width: 148px; max-width: 42vw; }
  .header-right { display: none; }
  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    margin-left: auto;
    border-radius: 12px;
    background: #f5f7fb;
    border: 1px solid var(--theme-border-card);
  }
  .header .nav {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    left: 16px;
    right: 16px;
    flex-direction: column;
    gap: 8px;
    padding: 14px;
    background: rgba(255,255,255,.98);
    border: 1px solid var(--theme-border-card);
    border-radius: 18px;
    box-shadow: 0 20px 44px rgba(13,17,23,.14);
    backdrop-filter: blur(14px);
    z-index: 1002;
  }
  .header .nav.open { display: flex; }
  .header .nav-item { width: 100%; }
  .header .nav-item > a {
    width: 100%;
    justify-content: space-between;
    padding: 14px 16px;
    border-radius: 14px;
  }
  .header .dropdown-menu {
    position: static;
    left: auto;
    top: auto;
    transform: none;
    min-width: 0;
    width: 100%;
    margin-top: 8px;
    padding: 8px;
    border: 1px solid var(--theme-border-card);
    border-radius: 14px;
    box-shadow: none;
    opacity: 1;
    pointer-events: auto;
    display: none;
  }
  .header .nav-item.show .dropdown-menu { display: block; }
  .header .dropdown-menu a {
    padding: 12px 14px;
    border-radius: 10px;
  }
  .nav-mobile-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-top: 8px;
  }
  .nav-mobile-actions .btn {
    width: 100%;
    min-height: 44px;
  }
  .hero { padding: 56px 0 64px; }
  .hero-text { max-width: none; }
  .hero-text p {
    font-size: 15px;
    margin-bottom: 24px;
  }
  .products-grid,
  .adv-grid,
  .scenario-grid,
  .prod-adv-grid,
  .dl-grid,
  .help-video-grid {
    gap: 12px;
  }
  .product-card,
  .adv-item,
  .scenario-item,
  .prod-adv-card,
  .dl-card,
  .help-video-card {
    border-radius: 16px;
  }
  .product-card {
    padding: 18px 14px;
  }
  .product-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 12px;
    border-radius: 12px;
    font-size: 22px;
  }
  .product-card h3 {
    font-size: 15px;
    margin-bottom: 6px;
    line-height: 1.4;
  }
  .product-card p {
    min-height: 0;
    margin-bottom: 12px;
    font-size: 12px;
    line-height: 1.55;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .product-card-action {
    margin-top: 12px;
  }
  .product-card .btn {
    min-height: 36px;
    padding: 8px 12px;
    font-size: 12px;
    border-radius: 10px;
  }
  .adv-item {
    padding: 18px 14px;
  }
  .adv-icon {
    width: 40px;
    height: 40px;
    margin-bottom: 12px;
    border-radius: 10px;
    font-size: 20px;
  }
  .adv-item h4 {
    font-size: 14px;
    margin-bottom: 6px;
    line-height: 1.4;
  }
  .adv-item p {
    font-size: 12px;
    line-height: 1.55;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .scenario-item {
    padding: 18px 12px;
  }
  .scenario-item .icon {
    font-size: 28px;
    margin-bottom: 10px;
  }
  .scenario-item h4 {
    font-size: 14px;
    margin-bottom: 4px;
    line-height: 1.35;
  }
  .scenario-item p {
    font-size: 11px;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .prod-adv-card {
    padding: 18px 14px;
  }
  .prod-adv-icon {
    font-size: 28px;
    margin-bottom: 10px;
  }
  .prod-adv-card h4 {
    font-size: 14px;
    margin-bottom: 6px;
    line-height: 1.4;
  }
  .prod-adv-card p {
    font-size: 12px;
    line-height: 1.55;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .hero-stats {
    gap: 12px;
    margin-top: 28px;
  }
  .hero-stats .stat {
    flex: 1 1 calc(50% - 6px);
    min-width: 0;
    padding: 12px 10px;
    background: rgba(255,255,255,.06);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: 14px;
  }
  .hero-stats .stat-num { font-size: 24px; }
  .hero-stats .stat-label { font-size: 12px; }
  .page-hero {
    padding: 48px 0 42px;
  }
  .page-hero p {
    max-width: 31ch;
    margin: 0 auto;
    font-size: 14px;
    line-height: 1.7;
  }
  .breadcrumb {
    flex-wrap: wrap;
    row-gap: 6px;
    margin-bottom: 14px;
  }
  .product-hero {
    padding: 56px 0 52px;
  }
  .product-hero .container { gap: 28px; }
  .product-hero-text,
  .product-hero-img { width: 100%; }
  .product-hero-text p {
    font-size: 15px;
    margin-bottom: 24px;
  }
  .feature-tags { gap: 10px; }
  .feature-tag {
    padding: 7px 12px;
    font-size: 12px;
  }
  .mock-window { padding: 16px; }
  .mock-card { padding: 12px 8px; }
  .prod-adv-card,
  .step-item { padding: 24px 20px; }
  .pricing-note {
    text-align: left;
    line-height: 1.7;
  }
  .dl-tabs,
  .notice-tabs-flat .notice-tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 6px;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }
  .dl-tabs::-webkit-scrollbar,
  .notice-tabs-flat .notice-tabs::-webkit-scrollbar { display: none; }
  .dl-tab,
  .notice-tab {
    flex: 0 0 auto;
    white-space: nowrap;
  }
  .dl-overview-copy h2 { font-size: 24px; }
  .dl-overview-copy p {
    font-size: 13px;
    line-height: 1.7;
  }
  .dl-overview-stats { gap: 12px; }
  .dl-stat { padding: 16px 14px; }
  .dl-group-head {
    margin-bottom: 18px;
    padding-bottom: 16px;
  }
  .dl-card {
    padding: 18px;
    gap: 14px;
  }
  .dl-card-top { gap: 12px; }
  .dl-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    font-size: 24px;
  }
  .dl-card h3 {
    font-size: 15px;
  }
  .dl-subtitle {
    font-size: 11px;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .dl-card .dl-meta {
    gap: 8px;
  }
  .dl-card .dl-meta span {
    height: auto;
    min-height: 28px;
    padding: 6px 10px;
    font-size: 11px;
  }
  .dl-card .dl-desc {
    font-size: 12px;
    line-height: 1.55;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .dl-footer { width: 100%; }
  .btn-download {
    min-width: 0;
    padding: 10px 12px;
    font-size: 12px;
  }
  .notice-toolbar {
    gap: 12px;
    margin-bottom: 24px;
  }
  .notice-tabs-flat,
  .notice-toolbar-search {
    width: 100%;
  }
  .notice-card { padding: 18px; }
  .helpcenter-layout { gap: 18px; }
  .help-sidebar { border-radius: 16px; }
  .help-sidebar-search { padding: 14px; }
  .help-cat-title { padding: 13px 15px; }
  .help-cat-item { padding: 10px 15px 10px 28px; }
  .help-content {
    padding: 20px 18px;
    min-height: auto;
  }
  .help-content h2 {
    font-size: 20px;
    margin-bottom: 16px;
    padding-bottom: 12px;
  }
  .help-contact {
    flex-direction: column;
    align-items: flex-start;
    padding: 18px;
  }
  .help-video { margin-top: 42px; }
  .help-video-link {
    height: 110px;
    font-size: 36px;
  }
  .help-video-copy {
    padding: 14px;
  }
  .help-video-heading {
    font-size: 14px;
    margin-bottom: 4px;
    line-height: 1.4;
  }
  .help-video-text {
    font-size: 11px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .contact-float {
    right: 14px;
    bottom: 20px;
    gap: 8px;
  }
  .contact-float a {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    font-size: 18px;
  }
  .news-item a {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
  .news-item .date { margin-left: 0; }
  .footer { padding-top: 44px; }
  .footer-grid { gap: 28px; }
  .footer-brand-mark { width: min(148px, 60vw); }
}

@media (max-width: 560px) {
  .header .container { min-height: 64px; }
  .logo-img { width: 132px; }
  .header .nav {
    left: 12px;
    right: 12px;
    top: calc(100% + 8px);
    padding: 12px;
  }
  .nav-mobile-actions { grid-template-columns: 1fr; }
  .products-grid,
  .adv-grid,
  .scenario-grid,
  .prod-adv-grid,
  .dl-grid,
  .help-video-grid {
    gap: 10px;
  }
  .product-card,
  .adv-item,
  .scenario-item,
  .prod-adv-card,
  .dl-card {
    padding: 16px 12px;
  }
  .product-card h3,
  .adv-item h4,
  .scenario-item h4,
  .prod-adv-card h4,
  .dl-card h3,
  .help-video-heading {
    font-size: 13px;
  }
  .product-card p,
  .adv-item p,
  .prod-adv-card p,
  .dl-desc,
  .help-video-text {
    display: none;
  }
  .scenario-item p,
  .dl-subtitle,
  .dl-card .dl-meta {
    display: none;
  }
  .product-card .btn,
  .btn-download {
    min-height: 34px;
    padding: 8px 10px;
    font-size: 11px;
  }
  .dl-icon,
  .product-icon {
    width: 44px;
    height: 44px;
    font-size: 20px;
  }
  .hero-btns { gap: 12px; }
  .hero-stats { margin-top: 24px; }
  .product-hero-text h1 { font-size: 26px; }
  .feature-tags { gap: 8px; }
  .section-title p { font-size: 14px; }
  .dl-overview-stats { gap: 10px; }
  .dl-title-row { gap: 8px; }
  .dl-card .dl-meta { gap: 8px; }
  .help-article {
    font-size: 13px;
    line-height: 1.8;
  }
  .help-code-block {
    padding: 14px;
    font-size: 12px;
  }
  .help-video-link {
    height: 120px;
    font-size: 40px;
  }
}